<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<div style="border: 3px solid green;height: 100px;margin: 50px;">
    <div style="border: 1px solid red;height: 20px;background-color: red;padding-top: 10px;"></div>
</div>
</body>
</html>